Several factors influence the choice of material, such as exposure to different media, pressure levels, temperature conditions, and potentially strict regulatory standards, especially in industries like food and beverage or oil and gas. Types of sealing materials include:

• Rubbers:  NBR, FKM, and HNBR are widely used rubber materials in hydraulic applications. They are highly flexible, easily stretched, and deflected with minimal force. Many of these rubbers offer excellent resistance to mineral oils, greases, and other media.
• PTFE: Designed for extreme conditions, PTFE and its compounds can endure harsh chemicals, as well as high temperatures and pressures. Their very low coefficients of friction also allow them to perform well in dry running conditions.
• Plastics: Plastic materials are capable of withstanding higher temperatures, chemicals, and mechanical stresses, ranging from engineering to high-performance plastics. Backup rings, often made from plastics, are typically used to improve the pressure-handling capability of rod or piston seals.
• Thermoplastic elastomers:  These materials combine the benefits of both rubber and plastic. High-performance thermoplastic polyurethanes (TPUs) provide excellent abrasion and wear resistance, low compression set, high tear strength, and outstanding pressure resistance.

There are a range of criteria that must be considered before selecting the material for the seal. Fluid type, pressure, temperature and speed of operation all affect the choices made. Hydraulic seals have a crucial impact on system performance in many applications, and getting the material choice wrong can severely impact the overall performance and lifespan of the seal.

Dobsons Gaskets has a wealth of experience in manufacturing seals and will advise on and produce the right seal materials for your application. Get in touch today to discuss your gasket and seal needs.